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Chd|====================================================================
Chd|  SPMD_FVB_SWITCH               source/mpi/airbags/spmd_fvb_switch.F
Chd|-- called by -----------
Chd|        RESOL                         source/engine/resol.F         
Chd|-- calls ---------------
Chd|        ELBUFDEF_MOD                  ../common_source/modules/mat_elem/elbufdef_mod.F
Chd|        FVBAG_MOD                     share/modules/fvbag_mod.F     
Chd|====================================================================
      SUBROUTINE SPMD_FVB_SWITCH(MONVOL)
C  Broadcast the information that a type 8 fvmbag has switched to type 7 UP monvol
C  To avoid deadlock, all processor must know which FVMBAGs have switched
C  to UP
C-----------------------------------------------
C   M o d u l e s 
C-----------------------------------------------
      USE FVBAG_MOD
      USE ELBUFDEF_MOD
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com04_c.inc"
#include      "param_c.inc"
C-----------------------------------------------
C   M e s s a g e   P a s s i n g
C-----------------------------------------------
#ifdef MPI
#include "mpif.h"
#endif
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER MONVOL(*)                                                
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER :: K1,N,ITYP(NVOLU),ITYPR(NVOLU),IERR
C-----------------------------------------------
#ifdef MPI

      K1=1
      DO N=1,NVOLU
         ITYP(N)=MONVOL(K1-1+2)
         K1=K1+NIMV
      ENDDO

      CALL MPI_ALLREDUCE(ITYP,ITYPR,NVOLU,MPI_INTEGER,MPI_MIN,MPI_COMM_WORLD,IERR)
      K1=1

      DO N=1,NVOLU
         IF(MONVOL(K1-1+2) == 8 .AND. ITYPR(N) == 7) THEN 
           MONVOL(K1-1+2) = 7 
           MONVOL(K1-1+15) = -1 
         ENDIF
         K1=K1+NIMV
      ENDDO
#endif 
      RETURN
      END      

